Quick question about implementing a seamless secret rotation strategy for Genesys Cloud OAuth client credentials within a .NET 6 Azure Function environment.
I am currently managing a high-throughput webhook consumer that processes Genesys Cloud events via Azure Event Grid. The function uses the client_credentials grant type to obtain access tokens for downstream API calls (specifically for updating interaction records and querying analytics). Currently, the client ID and secret are stored in Azure Key Vault and injected into the function app configuration.
The problem arises when we need to rotate the OAuth client secret in Genesys Cloud. The standard procedure involves creating a new secret, updating our local configuration, and then disabling the old one. However, during the window where the old secret is still active but we are transitioning to the new one, or if there is a slight delay in the Azure App Service config propagation, we experience authentication failures. This leads to dropped webhook processing and requires manual intervention to restart the function app or refresh the config.
I have attempted to implement a retry mechanism in my HttpClient wrapper that catches 401 Unauthorized responses and attempts to re-fetch the token with the new secret from Key Vault. However, this feels like a band-aid solution. Is there a recommended pattern or Genesys Cloud API feature that allows for overlapping validity periods for secrets, or a way to validate the token expiration more granularly before making the request?
Here is the current retry logic in my .NET service:
public async Task<HttpResponseMessage> GetWithRetry(HttpClient client, string url)
{
var response = await client.GetAsync(url);
if (response.StatusCode == HttpStatusCode.Unauthorized)
{
// Refresh token using new secret from Key Vault
await _tokenService.RefreshToken();
return await client.GetAsync(url);
}
return response;
}
Error: 401 Unauthorized - Invalid client credentials. The client_secret does not match the registered secret.
How are other advanced users handling this rotation without causing downtime in their Azure Functions? Should I be using a different grant type or perhaps a service principal approach that handles rotation more gracefully?